I built a new gaming PC a few months ago. CPU = 4770k RAM = 32GB DDR PC1600 Video = GTX 780 HDD = Intel DC S3500 600GB Case = Silverstone TJ08B The GPU has some coil whine under load. I have read this is common for today's high end video cards. Fortunately you can't hear it when the case is closed. The PSU itself also had some whine. It was a Seasonic X750W. I ended up replacing it with a 750W Rosewill brand (newegg's brand) which doesn't have that problem.